Sometimes, after acne clears up, it leaves small, flat dark marks in place of where the pimple was. These marks are due to excess pigmentation that is a result of the inflammation that the acne causes. Pressing or squeezing pimples can also contribute inflammation which will worsen the post acne brown spots. People with darker skin types are particularly vulnerable to post acne brown spots. . . . → Read More: How to remove acne marks: brown spots


